As for volcanoes, it might one day be possible to avert eruptions by manipulating the magma beneath them, but we are many years from that being a realistic possibility. For now, we must get better not only at monitoring volcanoes – even a few hours" notice of an eruption makes a big difference – but at spotting them. As Mani warns, Indonesia has "more volcanoes than you can shake a stick at, and many of them we" – the world"s volcanologists – "have never properly looked at."